Oval Profile Cylinder Form Factors in British and Scandinavian Locks
Engineering Overview: Technical guide on British and Scandinavian oval profile cylinders, detailing dimensions, screw mountings, and mortise compatibility.
Technical & Engineering Specifications
| Cam Type | DIN 30-deg Cam or Flat Tailpiece |
|---|---|
| Application | Commercial Hollow Metal & Wooden Doors |
| Body Material | Solid Extruded H59 Brass (CW617N) |
| Mounting Method | Lateral M5 Screw or Rear Through-Bolts |
| Profile Standard | British Oval / Scandinavian Oval SS 3522 |
Form Factor & Standard Dimensions
Oval Profile Cylinders are standardized architectural hardware form factors widely specified across the UK, Australia, and Scandinavian markets. Unlike the European teardrop cross-section, oval cylinders feature an oval body envelope (nominal dimensions approximately 31.5 mm height by 18 mm width).
British vs. Scandinavian Formats
- British Oval Cylinders: Slid horizontally into matching oval cutouts in British architectural mortise lockcases, secured via a central lateral fixing screw.
- Scandinavian Oval Cylinders: Divided into independent external and internal modules secured via twin high-tensile steel through-bolts from the interior door face.
Operational Benefits
Oval profiles provide clean architectural sightlines and superior clearance in narrow-stile timber and commercial hollow metal entrance frames.
Frequently Asked Engineering & Selection Questions
Q1: Can an oval cylinder fit into a Euro profile lockcase?
No. Oval cylinders and Euro teardrop cylinders have different body profiles and require matching mortise lockcase cutouts.